Personally, I like to go for (own brand cheapo philly style) cream cheese on toast if I want more substance than butter/marge.

If speed is an issue it's a quick splurge of squeezy tommy K on a couple of rounds of toast. Then: Slam together, sandwich style, wedge in gob, grab phone & headphones, rush out the door & down the stairs, sort out Today on Radio 4, remove toast sandwich from gob, separate slices, enjoy.